To investigate the safety of influenza vaccination during hospitalization, researchers from Kaiser Permanente assessed the health records of >250,000 patients, 6 months of age and older, who were hospitalized during any of the 3 flu seasons from 2011 to 2014 and were admitted and discharged between September 1 and March 31.

The aim of the STRIVE study was to investigate whether a single vaccination given 10-60 days before spinal surgery could prevent S. aureus infection in adults undergoing elective spinal fusion surgery.